Can you fade in and out particles in blender eevee?
Here is an example of one way to do it in EEVEE. The idea is to use an object as the base for a particle instance, then to give that object a material that fades in and out over time.
The setup for the material is this - The primary factor of this is that you can type #frame into the field of a value node, and it will then provide the value of the frame position at any given point. I used some math to make it oscillate, and to slow it down a little. The idea is to use the sine of the frame number as a Mix Factor between the regular material (particle color) and a Transparent Shader, thus making it fade in and out. You can adjust the division number to speed up or slow down the fade. Lastly, don't forget to change the Blend Mode.